Detailed in this brochure is the company’s On Guard line of industrial-strength disposable panel filters. The literature highlights the four different styles of On Guard, 1-in. and 2-in. thicknesses with fiber glass or synthetic media. The literature also describes the heavy-duty construction, which includes the one-piece pinch frame, made of heavy-duty kraft board. The company says this frame is sealed to the media with polyethylene adhesive under heat and pressure, forming a continuous bond around the entire perimeter of the filter. It says the media cannot be pulled out of the frame.